Oh No! Not good...
OWC is one of the few companies which make cases to house Apples custom SSD's. Sadly, the new function key model uses a still newer physical connection than what OWC offers in their cases so there is no means to gain access without leveraging a second MacBook Pro 13" Function Key system to host your SSD (swapping them out) then copy off your stuff to an external drive then pop the original SSD back in (if its larger).